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    <title>Document</title>

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<body>
        <div class="navbar navbar-inverse navbar-fixed-top" role="navigation" id="menu-nav">
                <div class="container">
                    <div class="navbar-header">
                        <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
                            <span class="sr-only">切换导航</span>
                            <span class="icon-bar"></span>
                            <span class="icon-bar"></span>
                            <span class="icon-bar"></span>
                        </button>
                        <a class="navbar-brand" href="#">现代浏览器博物馆</a>
                    </div>
                    <div class="navbar-collapse collapse">
                        <ul class="nav navbar-nav">
                            <li class="active"><a href="#ad-carousel">综述</a></li>
                            <li><a href="#summary-container">简述</a></li>
                            <li class="dropdown">
                                <a href="#" class="dropdown-toggle" data-toggle="dropdown">特点 <span class="caret"></span></a>
                                <ul class="dropdown-menu" role="menu">
                                    <li><a href="#feature-tab" data-tab="tab-chrome">Chrome</a></li>
                                    <li><a href="#feature-tab" data-tab="tab-firefox">Firefox</a></li>
                                    <li><a href="#feature-tab" data-tab="tab-safari">Safari</a></li>
                                    <li><a href="#feature-tab" data-tab="tab-opera">Opera</a></li>
                                    <li><a href="#feature-tab" data-tab="tab-ie">IE</a></li>
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                            <li><a href="#" data-toggle="modal" data-target="#about-modal">关于</a></li>
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